About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Rheological Factors and Compact Microstructures of Pressure Cast Technical Ceramics |
Author(s) |
Emelia Enke, Hyojin Lee, Stephen DiPietro, William Carty |
On-Site Speaker (Planned) |
Emelia Enke |
Abstract Scope |
Pressure casting nano-scale colloidal systems is an excellent alternate to sol-gel forming when creating high-performance technical ceramics. Pressure casting increases the rate of deposition, generates a higher density, avoids particle segregation, and creates a more uniform compact compared to other forming routes. We propose that the rheology and particle characteristics of the suspension determine the final microstructure, not the applied pressure. Coagulation can be implemented to create a connected but compressible matrix eliminating particle segregation. The added pressure collapses the microstructure to its network strength to create the densest green microstructure. Through this technique, large uniform compacts are created from colloidal particles without requiring a lengthy controlled drying process. |